AKISPL Function....
AKISPL Function....
(OP)
Hallo,
I really need your help here.
I want to run my crankshaft using the spline data as in graph( the red line).
So i use AKISPL function for the motion(highlight in turqoise) in 360 degree using the velocity data (spline).
However, i did not get the good result for the forces at the joints at the machine.
Can anyone help me, how to move the crankshaft using my spline data as in the graph?
Thanks.
I really need your help here.
I want to run my crankshaft using the spline data as in graph( the red line).
So i use AKISPL function for the motion(highlight in turqoise) in 360 degree using the velocity data (spline).
However, i did not get the good result for the forces at the joints at the machine.
Can anyone help me, how to move the crankshaft using my spline data as in the graph?
Thanks.





RE: AKISPL Function....
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
FYI, i used cyclindrical joint at the crankschaft as u seen in 2nd attachment...
the problem is:
when i measured the angular velocity at motion, the values are so high compared to the original values(red line in the 1st attachment)
the measured values of angular velocity should be the same with the original values.
when i measured the forces at the joints, the values are also irrelevant; more than 10000000
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
SPLINE/510,
,X=0,0.04 (etc)
MOTION/735,JOINT=10,ROT
,FUNC=DTOR*AKISPL(TIME,0,510)
Joint 10 is a revolute joint, and the spline is in degrees
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
Sorry i`m new to ADAMS....
what is adm code?
RE: AKISPL Function....
RE: AKISPL Function....
Typical problems with using splines to drive motions are that the spline does not allow for a smooth acceleration up to the initial condition, and that the data is spiky.
Here is a succesful run where a vehicle model is being driven by the above method showing the overlay betwen the drive splines and the model behaviour
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
Is it same when i write this function: DTOR*AKISPL(time,0,v_spline, 0) to the Motion?
Then the result for the forces of 1 spherical Joint is shown in the attachment....
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
i use the cyclindrical Joint at the crankshaft as shown in my 2nd attachment...
yes i already try it with gently accelerating. So the result(smoother) are shown in the attachment...
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
i mean no more spiky graph as shown before...
what cause this spiky results actually??
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
i cannot get it....
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....
but this is something new for me...can you show me example?
Thank!
RE: AKISPL Function....
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: AKISPL Function....